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Subject: Plant Breeding × Author: Baruah, Sulakshana × Start date: 2013 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Assessment of seed quality and incidence of aflatoxin in maize during storage
    (AAU, Jorhat, 2022) Baruah, Sulakshana; Sarma Barua, Nagendra
    The present investigation was undertaken to assess the seed quality attributes and incidence of aflatoxin in maize seeds in different treatment combinations at two different storage periods. Equal amounts of seeds of maize composite variety Vivek Sankul Makka-35 were stored in nine different bag-seed treatment combinations consisting of three bags namely, 150micron polyethylene bag (PEB), high density polyethylene interwoven bag (HDPE) and polylined jute bag (PLJB) and three levels of seed treatments viz., turmeric powder @ 20g/ kg of seeds (TP), carboxin 75% WP @ 2.5g/ kg of seeds (carboxin) and control. The seeds were stored up to six months. At three months of storage, PEB gave the most favourable mean performance for germination index, shoot length, seedling length, field emergence, and percent seed infection and it was at par with HDPE for these characters. PEB gave the best mean performance for moisture content, shoot length, seedling dry weight and field emergence at six months of storage. Seeds treated with carboxin 75% WP showed the most favourable mean performances for moisture content, germination index, root length, seedling length, seed vigour index-I, seed vigour index-II, field emergence and percent seed infection at both three and six months of storage. The bag-seed treatment combination of 150 micron polyethylene bag-carboxin 75% WP (PEB-carboxin) gave the best performance than other bag-seed treatment combinations in both three and six months of storage in respect of moisture content, shoot length, seedling dry weight and percent seed infection. PEB-carboxin was found to be appreciably economic as compared to other bag-seed treatment combinations. It was observed from correlation of characters that, with increase in seed moisture content, there was decrease in shoot length, seedling length, seed vigour index-I and seed vigour index-II and increase in percent seed infection at six months of storage. Simple correlation coefficient between two periods of storage i.e., three months and six months, for each character was either significant or highly significant indicating consistent result or trend in increase or decrease of mean performance for a character from three months‟ to six months‟ period. Total aflatoxin concentration in maize seeds was observed to be of less than 3 ppb in six bag-seed treatment combinations while the amount was more in the three control bags at six months of storage. Treatments, thus, were found suitable for getting reduced incidence of total aflatoxin at the end of entire storage period.